A platinum Cartier Astrotourbillon copy stands or falls on four checks: the case metal and its finish, the carriage that sweeps the dial once a minute, the dial print and hands, and the movement behind the caseback. The carriage is the deciding detail. If the orbiting arm is wrong, the watch reads as a copy from across a table no matter how good the case polishing looks.
duplicate cartier astrotourbillon platinum
Why the platinum reference is hard to copy
The Astrotourbillon puts the balance wheel at the end of a long arm that travels around the dial center once per minute. The arm itself acts as the running seconds, so any hesitation or stutter is visible at a glance. The platinum version adds a second problem: platinum is dense and has a cooler, grayer white than rhodium-plated steel. Most copies use steel with bright rhodium plating or tungsten, and both read wrong under daylight. Weight is the fastest tell. A platinum case of this size has real heft, and a steel case of the same dimensions does not.
Prerequisites
- Reference photos of the exact platinum reference, printed at 1:1 scale.
- A digital scale that reads in grams.
- A 10x loupe.
- A small magnet.
- Familiarity with your state and federal rules on counterfeit goods, covered at the end.
Step-by-step evaluation
- Download the official images of the platinum reference from Cartier and print them at actual size, so you can lay the watch on the page and compare outline, lug shape, and bezel width directly.
- Weigh the watch on the scale and write the number down. Compare against a known steel watch of similar diameter. A genuine platinum case should feel clearly heavier in the hand.
- Hold the watch beside a sheet of white paper in daylight and judge the case color. Platinum is a soft gray-white. Rhodium plating looks blue-white and thin at the lug edges.
- Start the watch and watch the carriage for a full two minutes. The arm should complete one clean lap per minute with no jump, no pause at the 12 or 6 position, and no wobble at the balance end.
- Inspect the arm under the loupe where it meets the center bridge. Look for machining marks on the top surface and for a balance wheel that sits off-center on the arm.
- Check the dial print with the loupe: the Cartier signature weight, the Roman numeral spacing, and the hidden signature inside the VII if the reference carries one.
- Turn the watch over and read the caseback engraving. Compare font, depth, reference number format, and serial placement against your printed reference sheet.
- Look at the movement finish through the caseback. Genuine-grade finishing shows hand-bevelled bridges and clean interior angles. Copy movements usually show flat, machined bevels and uneven perlage.
- Wind the watch fully and let it sit for the rated power reserve, noting the time it stops. A copy that dies well short of the stated reserve has a mismatched mainspring or barrel.
- Touch the magnet to the caseback only, never the dial side. A strong pull on the case suggests a plated brass or pot-metal mid-case.
- Check the strap and buckle last. Platinum references ship on alligator with a matching precious-metal buckle, and copies often pair a steel buckle with a stamped hallmark.
Red flags
- Carriage laps in 30 or 90 seconds instead of 60.
- Case color that shifts blue under fluorescent light.
- Engraving that is laser-etched rather than cut.
- Seller who will not show the movement running on video.
- Weight within a few grams of a steel watch of the same size.
Legal note for US buyers
Selling counterfeit watches is illegal in the United States, and US Customs can seize counterfeit trademarked goods at import. Buying a copy for personal wear sits in a gray zone that varies by state, so confirm the rules where you live before you spend money. Treat any seller who ships without declaring the goods as a risk to your money, not just your package.